Effectiveness of photocatalytic degradation of phenol in aqueous solution using semiconductor oxides SO prepared by a sol-gel method was examined. The physical and chemical properties of synthesized catalysts were investigated by X-ray diffraction XRD, diffuse reflectance UV-Vis spectroscopy DRS, and N2-adsorption measurements. The optimal conditions of the photocatalytic degradation of phenol using prepared titanium dioxide sample were defined.